Printing mechanism



'7 Sheets-Sheet l ATTORNEY A. w. MILLS PRINTING MECHANISM Filed July 7;193

Oct. 4, 1938.

QM my A. W. MILLS PRINTING MECHANISM Oct. 4, 1938.

Filed July '7, 1936 '7 Sheets-Sheet 2 IN V EN TOR.

N ATTORNEY- Oct. 4, 1938. A. w. MILLS 2,131,918

- PRINTING MECHANISM Filed July 7, 1956 7 Sheets-Sheet 3 FIGQ 3.

INVENTOR.

wzaapd BY ATTORNEY A. W. MILLS PRINTING MECHANISM Filed July 7, 1936Oct. 4, 1938.

7 Sheets-Sheet 4 INVENTOR ATTORNEY Oct. 4, 1938. w MILLS PRINTING.MECHANISM 7 Sheets-Sheet 5 Filed July '7, 1936 ATTORNEY Oct. 4, 1938. A.w. MILLS 2,131,918

PRINTING MECHANISM Filed July 7, 1936 v Sheets-Sheet 6 FIG.13. -F|G.12.

SALES REPORT F'IRESIDE LUMBER C0 'SALESMAN COMMODITY VALUE 'z o JONESSTREET JOHN JONES TIRES 40525 CLEVELAND OHIO TUBES 497a H" -I CHA fly \AINS 3 519 93500 605000 PATCHES 3654 |00750 50000 V.A. KATZ TIRES 652I6500o 090550 TUBES 18227 575000 3900500 I CHMNS 9450 B. L. VERGE Tl RES53354 TUBES l64-20 CHAINS 4615a PATCHES 5524- F IG.14.

INVENTORY REPORT ITEM uun' COST QUANTITY TOTAL cos ACME 2350 26 61 100ETHER 2845 120 341400 TONONE s5 WESTERN 3420 31 1 0502 o HQTTEX 13s 12511000 LIBERTY 214 QUEEN 2 79 94 2622 a DUPLEX 2a ROTARY 1 s25 17 v 25925wss'rsnu 2143 1 2 2571s 7 INENTOR ATTORNEY to operate for other cycles.

Patented Oct. 4, 1938 PATENT OFFICE I rnm'rma MECHANISM Albert W. Mills,Endicott, N. Y., asslgnor to Internationai Business MachinesCorporation, New York, N. Y., a corporation of New York Application July7, 1936, Serial No. 89,277

8 Claims.

The present invention relates to record controlled machines in generaland, more particularly, to printing mechanism for such machines.

s'Ihe broad object of the invention is to provide an improved printingmechanism which is simpler and more flexible than former printingmechanisms.

A further object is to provide means controlled by records and adaptedto suppress printing operations.

A more specific object of the invention is to provide improved means foreifecting group indication or non-repetitive printing of data which issensed in each of a succession of record cards.

In prior machines, group indicating has been effected by mechanism whichprevented the positioning of type bars, or, by preventing the sensing ofthe record cards. The present arrangement contemplates the use ofso-called hammer locks which may be selectively operated to take animpression from the type bars. These hammer looks, when properly set,prevent any selected type bar hammers from operating for certain cyclesof the machine and allow these hammers Due to the flexibility of thearrangement, it can be used to prevent repetitive printing of groupindications when the tabulating machine is conditioned for listing, thatis, printing from each record card. It can be used to control theselection of printing; that is, it can select certain cards or portionsof cards for printing and eliminate all others. ther be utilized for theprevention of over printing of indications and totals which ,wouldnormally occur when the setting of the machine is shifted from "listingto tabulating without changing the plug connections.

, Another object of the invention is to provide improved means forcausing the selective printing of debit and credit amounts.

Another object of the invention is to provide means for controlling theprinting of zeros by a group of printing elements.

Various other objects and advantages of the invention will be obviousfrom the following particular description of one form of mechanismembodying the invention or from an inspection of the accompanyingdrawings; and the invention also constitutescertain new and usefulfeatures of construction and combination of parts hereinafter set forthand claimed.

In the drawings:

Fig. 1 is a vertical section of a portion of the machine embodying thepresentinvention,

It can fur Fig. 2 is an outside view of the printing mechanism showingthe drive therefor.

v Fig. 3 is a view of a portion of the printing mechanism as viewed fromthe left in Figs. 1 and 2.

Fig. 4 is a fragmentary enlarged view of the column splitting mechanismas viewed in the direction of the arrows 4-4 of Fig. 1.

Fig. 5 is an enlarged side elevation of the column splitting mechanismshown in Fig. 4.

Fig. 6 is an isometric view showing the arrangement of the hammer lockand control mechanism therefor.

Figs. '7, 8, and 9 are details showing various operative positions ofthe hammer locks.

Fig. 10 is an enlarged view showing the type bar and zero printingcontrol mechanism.

Fig. 11 shows a fragment of a record card.

Fig. 12 is a sample of a record showing the manner in which zeroprinting is controlled.

Fig. 13 is a sample of a record showing the manner in which groupindicating is efiected.

Fig. 14 is a sample of a record showing the manner in which theprintingof selected items is suppressed.

Fig. 15 is a circuit diagram.

Fig. 16 is a timing diagram of the essential circuit controllingdevices.

The printing mechanism may be of any suitable form, but for conveniencemay be assumed to be substantially identical with the one described inmy U. S. Patent No. 2,016,682, granted October 8, 1935. It includes theusual platen it (Fig 1) and a number of vertically movable type barassemblies including carriers 12, slidably mounted on each of which aretype heads 13. The purpose of this type of construction will beexplained more fully hereinafter. Each type head has type elements itadapted to'print the numerals 1 to 9 and the letters A to Z. The typeelements M are arranged in nine groups in the following order from topto bottom in Figs. 1 and 10: Q. 0 5, E, N, V; 4, D, M, U; 3, C, L, T; 2,B, K, S; 1, A, J. Below the type elements M are two zero type elementsMa, Mb referred to hereinafter as the numeral zero and the alphabeticzero, respectively, which are separated from each other by a distanceequal to that between centers of three successive type elements I4. Thenumerical type elements l4 correspond to the usual numericaltypeelements of a conventional Hollerith type bar, but are spaced far enoughapart to make room for three alphabetic type elements between successivenumeral type elements.

The numeraltype elements are selected for a printing operation inidentically the same manner as in conventional Hollerith tabulatingmachines, for instance, as in Patent No. 1.822594 under control of aperforation in one of the index point positions 1 to 9 of a record cardcolumn. The alphabetic type elements are selected under control ofcombinations of perforations, each of which may comprise a perforationin one of the index point positions 0, 11, and 12, with another inthe-remaining nine index point positions; thus, the letter I of the typegroup is selected by the combination of a 9 perforation and a 12perforation in one of the columns of the record card; the letter R by a9 perforation and an 11 perforation. The entire code is similarlyarranged and the particular combinations are as set forth in mycopending application Serial No. 701,444, filed December 8, 1933.

The selection of the alphabetic type elements I4 is effected byarresting each carrier I2 in the appropriate position corresponding tothe value of a perforation in index point positions 1 to 9 of the recordcard and by further movement of the type head l3 relative to its carrierone, two, or three steps according 'to whether the other perforation ofthe combination necessary for a selection is in the 12, 11, or 0positions, respectively.

As a matter of convenience, the four positions of the type elements ineach group will be termed zones 1, 2, 3, and 4, the numeral type beingin zone 1, the letters A to I being in zone 2, the

letters J to R in zone 3, and the letters S to Z' in zone 4, the 0, 11,and 12 perforations which control the selection of the alphabetic typeelements will be termed zone perforations." mechanism which effectsrelative movement between each carrier l2 and its type head l3 may betermed the zoning" mechanism.

Each carrier i2 is provided with a series of stops l5 which in Fig. 1are labelled 0 to 9 and represent the corresponding index pointpositions on the record card. As the carrier i2 is moved upwardly, thestops I 5 move in succession to pass a stopping pawl IS. The latter isheld in the position of Fig. 1 by a latch I! which has connection l8with armature i9 of the usual printing magnet 20.

When a type carrier is used to print numerals only, it will, of course,be controlled by a single perforation in one of the index pointpositions 0 to 9, inclusive. In such case, each type head l3 and itscarrier I2 is maintained in the relationship shown in Fig. 1, and as thecard is passing the lower analyzing brushes, a circuit completed throughthe perforation in the card will energize the magnet 20 in a well knownmanner and will effect the release of pawl i6, causing it to engage thestop i5 corresponding in value to the location of the single perforationin the record card column. This operation results in bringing thecorresponding numeral type element in the type headv l3 to the printingline.

The carriers l2 are moved upwardly by a cam operated shaft 2i whichcarries arms 22 having depending link connection 23 with a ball 24pivoted at 25. Also pivoted at 25 are actuating arms 26 which areconnected attheir free ends to the lower extremity of carriers l2through link connections 21. Arms 26 are urged in a clockwise directionby springs 28 which are connected at their upper ends to a cross barsecured to arms 22. Thus, as the arms 22 and ball 24 are rocked in aclockwise direction by shaft 2|,

The

the springs 26 will rock the arms 26 in the same direction and willcause elevation of the carriers. i2.

The manner in which the type bar assemblies comprising carriers I2 andheads l3 are constructed to permit relative movement will now beexplained, after which the zoning mechanism whereby such relativemovement is effected will be set forth briefly.

The carrier i2 is shown in Figs. 1 and 10 as being provided with a slot29 and a guide 30 which are adapted to receive a slotted block and thelower end 32 respectively of the type head i3, the block sliding withinthe slot 29 and the lower end 32 sliding in the guide 30. A spring 33whose lower end is anchored to the carrier i2 is provided at its upperend with a hooked member which engages the lower edge of an opening inthe shank of the type head l3, the spring 33 tending to resiliently holdthe head I 3 in cooperation with the carrier i2.

Mounted upon the lower portion of each carrier I2 is a slide 36 providedwith grooved blocks 31 which cooperate with suitable slots in thecarrier i2. A spring 39 anchored at its lower end to the carrier l2 andat its upper end to the slide 36 tends to move the slide downwardly tobring a shoulder 40 in the slide into engagement with a block 4| rivetedto the carrier l2. With the parts assembled as in Fig. 1, the spring 39draws the slide 36 downwardly and spring 33 urges the type head l3 inthe same direction so that the lower end 32 thereof engages the slide36.

It is plain that if the slide 36 is moved upwardly relative to carrier I2, the head i3 will move likewise.

A spring-pressed latch 42 pivoted at the lower end of the carrier i2 isadapted to cooperate with three shoulder stops 43 formed in the slide36. When the slide is moved upwardly one or more steps with respect tothe carrier, the latch 42 will cooperate with one of the steps 43 tohold the parts in their displaced relationship. The manner in which suchdisplacement is automatically effected under control of the zoneperforations in the card will now be explained.

Associated with each alphabetic type bar assembly is a verticallyslidable comb 44 which is adapted to be moved downwardly and thenupwardly during each cycle of the machine. Each comb has a series ofthree stops or lugs 45 which on the upward movement of the comb passes astopping pawl 46 in synchronism with the passage of the zoneperforations O, 11 and 12 by the upper analyzing brushes of the machine.Each pawl 46 is controlled by a zone magnet 41, the. energization ofwhich operates its armature to release pawl 46, allowing the latter tobe moved by its spring into engagement with one of the stops 45. By thisaction, further upward movement of the comb 44 is prevented for the timebeing. The combs 44 are moved upwardly by means of a spring 5i and moveddownwardly by a bail 52 secured to a shaft 53. The ball engages theupper ends of the combs and moves the latter downwardly whenever theshaft 53 is rocked at the proper time by a suitable cam (not shown).

The comb 44 has pivoted thereto an arm 55 whose free end lies in thepath of movement of the associated slider 36 and whose lower edge restsupon a bail 56 which is pivoted at 51. Under control of the zoneperforations the pivot point of arm 55 may take one of three positionsbelow that of Fig. 1. In this figure the parts are shown with the combin the position it assumes when no zone holes are present in the card;that is, when numerals only are to be printed. When the carrier I2 is inits lowermost position, the ball 56 is rocked in a counterclockwisedirection to move the arm 55 in a similar direction into engagement withthe lower extremity of slide 36. It will be apparent that the distancewhich the free end of arm 55 is moved upwardly under control of the ball56 depends upon the location of the pivot .point ofarm 55 at such time.Thus, if the pivot point is located as shown in Fig. 1, the free end ofarm 55 will be moved upwardly to a position where it barely touchesslide 36. A zone perforation in the index point position will result inthe movement of the free end of arm 55 three steps upwardly from theposition of Fig. 1. A perforation in the 11 position will cause it tomove two steps, while a perforation in the 12 position will cause it tomove only one step above the position in Fig. 1. These steps of movementare, of course, transmitted to the slide 36 and it, in turn, will bemoved upwardly one, two, or three steps in accordance with the settingof the related comb M, the latch 42 carried by the carrier I2 serving tohold the slide at its displaced position with respect to the carrier.

Ball 56 is actuated through the medium of a toggle mechanism comprisinglinks 66, one of which is pivoted to the bail and the other is pivotedto an arm M. The point of connection of the links 58 carries an arm 62'which is also pivoted toan arm 66 secured upon a cross shaft 65. Theshaft 65 is rocked in a counterclockwise direction once each card cycleby a suitable cam (not shown) thus tending to straighten the togglecomprising links 56.

Referring to Fig. 2, an arm 66 carried by a rod 61 is adapted to berocked from the broken line position to the solid line position of Fig.1 prior to the straightening of the toggle links 58. When shaft 65 isrocked in a counterclockwise direction under control of its cam, theright end ,of arm M will be engaged by arm. 66 so that the pivot pointof the toggle will be restrained against downward movement andsubsequently straightening of the toggle will cause the bail 56 to rockin acounterclockwise direction. I

In Fig. 2, it will be noted that the rod 61! carries an arm 68 whoseupper end is adapted to be engaged by the free end of an armature latch69 operated by a magnet 10. Energization of this magnet will permit arm68 to rock in a counterclockwise direction under the influence of aspring and thereby rotate the rod 61 and the arm 66 to the solid lineposition of Fig. 1. The magnet I0 is in series with a switch H (Fig. 15)and cam contacts I2 which close once at the proper time in each cardcycle to energize magnet I0. When the machine is used for printingnumerals only. the zoning mechanism may be partially disabled to lightenthe operating load on the machine by opening switch II so that themagnet Iii remains deenergized and the arm 66 rem'ains in the positionshown by broken lines in Fig. 2 and straightening of the toggle throughthe action of the conrating numeral type.

index point positions only, the mechanism controlled by the zone magnets41 will not be effective to shift slide 36 relative to carrier I2 andthe type assembly will be arrested differentially, purely by theoperation of print magnet 20, as in former Hollerith tabulatingmachines. On the other hand, if a zone perforation also appears in the0, 11 or 12 positions, the magnet 41 will be effective in conjunctionwith magnet 26 to control the zoning mechanism, as described, to c useselection of one of the three alphabet type s a- In the presentarrangement of the type elements which differs from that in priormachines in the location of the zero type elements, if no perforationappears in a given column, the associated carrier I2 will move to aposition where the blank position immediately below the type element Ila (Fig. 10) is at the printing line. If only a zero perforation ispresent in a column, the type element Ma is positioned under control ofthe magnet 26. If the zoning mechanism is operative, the sensing of azero alone in a column will cause positioning of the lower zero typeelement Mb at the printing line... Whether or not a zero is actuallyprinted will de" pend upon the operation of the type hammers as will beexplained hereinafter.

Referring now to Fig. 10, each of the type carriers 12 is provided witha stop '15 which cooperates with a cross member 18 to position the typecarrier when its movement is not otherwise interrupted. When the zoningmechanism is ineffective and pawl I6 is tripped to position the typeelement I60. on the printing line, the stop I will have moved to aposition where its upper end engages an arm 'II rocking the lattercounterclockwise to cause clockwise rocking of latch member I9 to raisehook 60 thereof out of cooperation with a bail 6i. As will be ex-.plained hereinafter, this raising of hook 80 prevents the tripping ofthe printing hammer in the associated type bar position through memberI9. With the zoning mechanism operative, the

type head 13 would have been displaced upwardly three steps to presentthe lower zero type element Mb to the printing line and in this case,also, the cooperation of stop 15 with arm 'l'l would rock member I9 tothe same position and again tripping of the associated type hammer wouldhave been prevented. With no perforation in the column, the carriers I2would have risen an additional step. presenting the blank spacefollowing either of the type elements I la or I41) and consequently noprinting can take place in either position regardless of whether or notthe associated printing hammers are tripped.

In my prior application Serial No. 701,444 and in U. S. Patent No.2,016,682, the type elements were so arranged that when no perforationwas present in a column, one of the zero type elements was presented tothe printing line and it was necessary to provide additional mechanismto prevent printing from these zero type elements in certain positions.With the present arrangement whereby no type elements are presented tothe printing line when a column is blank, the provision of thismechanism is obviated and zero printing only takes place when a zeroperforation is present to definitely position the type elements. Themanner in which printing of the zeros is effected under control of thecolumn splitting mechanism will be set forth after the printing hammermechanism has been explained.

The printing hammers are designated 82 in Fig. 1 and are controlled insubstantially the same manner as those in U. S. Patent No. 1,867,026,granted July 12, 1932 to J. R. Peirce and in application Serial No.442,348, filed April 7, 1930 by J. R. Peirce. Such differences as existwill be described in detail hereinafter. The type hammers 82 areoperated by springs 83. Normally, hammer latches 84 pivoted on a crossshaft prevent the springs from forcing the hammers into contact with theheads of type elements I4, I4a or Mb. The hammers are re-latched aftereach operation by means of a cam operated bail 88 mounted on a shaft 81.Pivoted to each latch 84 is a spring operated hook member 18 normally inposition to be engaged by ball 8i secured to a shaft 88. The latter isoperated by a cam (not shown) which functions once each card cycle todraw any members 18 through their hooks 88, which may be in the positionof Fig. 1 to the left and operate the latches 84 to release the relatedhammers 82 for actuation of their springs to strike the type elements atthe printing line. Each member 18 cooperates with an arm 11 which, asexplained, cooperates with the stop 15 on the carrier. This stop is soplaced that movement of the carrier to any printing position forprinting from any of the type elements above element I4a will notdisturb the member, and hook 88 will remain in cooperative relationshipwith the ball 8 I.

The column splitting mechanism is substantially identical with the onedescribed in the Peirce U. S. Patent No. 1,867,026. A hammer couplingmember 83 (see Figs. 1, 4, and 5) is pivoted to the upper end of eachlatch 84. The members 83 have narrow tongues 83a which are adapted tounderlie bent-over lugs 84b formed in the adjacent latch 84, which lugsact as stops to limit counterclockwise movement of member 88. Abent-over lug 838, formed in each member 83, permits only limitedclockwise movement of each member 83 by contact with the edge of thelatch 84 to which said member is pivoted. A short arm 820. formed ineach member 83, has a rivet or boss adapted to engage holes 83d in latch84 to retain members 83 in the operative position of Fig. 5 or thealternative inoperative position in which lug 93b engages latch 84. Eachmember 83 also has an abutment 83c adapted to engage the lug 84b of thenext adjacent latch 8 to the one on which said member is pivoted.

Referring to Fig. 4, it will be assumed that the three coupling members83 shown correspond to the units, tens and hundreds denominationalorders ranging from bottom to top, respectively, of a bank assigned toprinting data and that all are in the position of Fig. 5. If thehundreds type bar now moves to print a 4, for example, its latch 84 willbe rocked clockwise (Fig. 5) as described above, to release the hammerfor the hundreds type bar. The abutment 83e of the hundreds couplingmember will, by engagement with the lug 84b of the tens latch 84, rockthe latter clockwise also. The latch 84 of the units type bar will alsobe operated by the tens latch 84, due to the abutment 83s of thecoupling member 83 of the tens latch engaging the lug 84b of the unitslatch and rocking the units latch 84 clockwise with reference to Figs. 1and 5. Thus, if neither of the units and tens type bars are arrested inone of the numerical positions 1 to 9 or A to Z, inclusive, the threetype bars corresponding to the three coupling members 83 shown in Fig. 4will print 400.

Now, if the upper member 83 (Fig. 4) associated with the hundreds typebar is moved clockwise (Fig. 5) until its lug 83b stops further movementof said member, the abutment 83c of this member will move to a positionbelow the lug 84b of the tens latch 84. As a result, the moving of thehundreds type bar to the 4" position, as before, will cause anineffectual movement of the coupling member of the hundreds latch 84 andneither the tens nor units latch 84 will be operated, and only thenumeral 4 will be printed. It will be seen that the coupling members 83may be selectively set to inactive position to split the solid bank oftype bars intoarbitrary groups and under these conditions, any type barassuming a position to present either of the zero type elements I 4a orI4b, will, through members 93, cause zeros to be automatically printedto the right of the operated type bar, up to the point where a couplingmember is set to inactive position.

An example of the manner in which zero printing is effected without theuse of special mechanism is shown in Fig. 12. In this figure the levers83 of Fig. 5 are set to the position shown in that figure in thesections designated A, so that positioning of any typebar in thesefields will cause tripping of the hammers 82 in all lower orderpositions. Thus, when the card bearing the street address is analyzed,the type bars will be set to the positions indicated with two of thebars adjusted to present zeros for printing. The hammers for printingthe two zeros are tripped under control of the hammer which prints thenumeral 2. The hammer in the position between 200 and Jones isalsotripped, but since the type bar in this position is at a blank position,no printing takes place.

The circuit connections for controlling the operation of the zonemagnets 41 and the print magnets 28 are shown in Fig. 15. A typicalcircuit established by the zone perforations is traced as follows: fromleft hand line wire 85, upper contact roll UCR and an upper brush UB,through a 0, 11, or 12 perforation in the record card, a wire 86, a plugwire 81, a magnet 41, and cam contacts 88 to right hand line wire 88. Atypical circuit established by a perforation in the 1 to 9 positions istraced as follows: line wire 85, a magnet 28, a wire I88, a plug wireI8I, a wire I82, a lower brush LB, a lower contact roll LCR, through ahole in the record card and cam contacts I83 to line wire 88. ,Asdescribed before herein, a circuit is also established through magnet 18when switch 1I is closed, as would be the case when alphabetic printingis being done.

Referring now to Figs. 1 and 6, each of the type hammers 82 is notchedto provide a shoulder I84 above each of which is located a leaf springlatch I85 secured at one end to a bar I86. Supported on the bar I86 by apivot rod I81 is a pair of cam levers I88 and I88, a pair of which isprovided for each latch I85. The lever I88 has its camming surface at aslightly greater distance from the pivot point I81 than the lever I 88and when rocked from the position of Fig. 6 to that of Fig. 7 willdepress the latch I 85 from the dotted line position of Fig. 7 to thefull line position where the free end of the latch lies in the path ofshoulder I84 of the printing hammer. With the latch in this position,the hammer is effectively locked against operation for all operations ofthe machine. The lever I88 when rocked to the position of Fig. 8 willmove the latch I 85 from the dotted line position in this figure to thefull enough to interfere with the operation of the printing hammer. Thesupporting bar I06 is mounted for oscillation on pins H journaled. inthe frame of the machine and may be rocked in a counterclockwisedirection as will be explained. When so rocked, as indicated in Fig. 9,the levers I09, which have been rocked to the position of Fig. 8,together with their latches I05, will assume the position of Fig. 9wherein the latches now cooperate with shoulders IM .to block theprinting hammers. Those latches I which have not been preset by thelevers I08 or I09 will assume the dotted line position indicated in Fig.9, wherein they do notinterfere with the operation of their respectivehammers. It will thus be seen that in positions in which the levers I09have been preset, blocking of the hammers will take place when the barI06 is rocked. This is brought about as follows:

Secured to the bar (Figs. 3 and 6) is a bracket I II which has pivotedthereto a link II2 whose lower end is connected to an arm H9 normallyheld in the position shown in Fig. 2 by the armature II I of a pair ofmagnets H5. Arm H3 is pivoted on a stud M6 on which is also pivoted abell crank I I! having a pin IIB underlying the arm II3. The lower armof the bell crank lies in the path of a roller II9 on arm I20. Arm I20is part of the linkage controlled by complementary cams I2I which-serveto reciprocate the type bars once each cycle of the machine and duringthe operation roller I I 9 causes counterclockwise rocking of bell crankIII to raisearm II3 slightly away from armature II I. It is at this timethat magnet I I5 may be energized and if energ'ization takes place, armH3 will be permitted to move in a clockwise direction and rocking of barI06 will consequently take place. Energization of magnet H5 may takeplace under control of a special perforation in the 11 index pointposition of a record card, such as indicated at X in Figs. 11 and 15.Upon sensing of this perfora tion by one of the upper brushes U3, acircuit is completed from line 95, upper contact roller UCR, X"perforation, brush UB, wire I22, plug connection I23, pick-up winding ofa relay R8, cam contacts CFB, timed to close when the X hole is at thebrush UB, upper card lever contacts UCL, to line 99. Energization ofrelay R9 will close its contacts RBa to provide a holding circuittraceable from line 95, wire I24, contacts R811, upper holding windingof relay R8, cam contacts CF22, to line 99. As indicated in Fig. 16,this holding circuit will be maintained throughout the remainder of thecycle and during the first half of the next following cycle during whichthe record card having the X perforation will traverse the lower brushesLB, during which time the data perforations will be sensed by thesebrushes to position the type carriers. Energization of relay R8 willalso cause closure of its contacts Rlic and if switch I25 is in its fullline position, a circuit will be completed during the next cycle throughcam contacts CFM, which extends from line 95, through cam contacts CFII, relay contacts RBc, switch I25, hammer lock magnet H5, to line 99. Inthis manner, record cards containing the special X perforation willcause locking out of those hammers whose levers I09 have been preset tothe position of Fig. 8 so that printing in those positions will not takeplace.

I If switch I25 is in its dotted line position, the opable from line 95,contacts CFH, normally closed relay contacts R8b, switch I25, hammerlock magnet II5 to line 99. In this case, the energization of relay R8,in response to the sensing of the X hole, will cause opening of contactsR8b and the operation of the hammer lock will be suppressed for cardshaving this perforation.

Fig. 13 illustrates a report as it would appear when listed with thehammer locks under X punch control. In this report the first four linesrepresent data contained on four cards, each of which contains the nameJohn Jones" and of which only the first card contains the X perforation.The levers I09 in the field in which this name of the salesman is to beprinted are set to the position of Fig. 8 and switch I25 is moved to itsdotted line position so that the hammer lock operation is suppressed forthe X" punched card and locking is effective for other cards.Alternatively, all the cards, except the first card of each group, mayhave the X punching; in which case, with switch I25 in its .full lineposition, the same report will be printed; that is, the hammers will belocked for all the X punched cards and they will be free to operate forthe non .X punched cards.

Fig. 14 illustrates a report in which the hammer lock control is usedfor printing certain portions of certain cards and eliminating theprinting of these same portions of other cards as in the case where themanagement does not wish the cost figures of certain items to be printedalthough they .are punched in the tabulating cards. Thus, in the reportof Fig. 14, the hammer lock levers I09 are set in the unit cost andtotal cost positions in the sections of the type bars which are to printunit cost and total cost. The switch I25 is set in its full lineposition and the third, sixth, and eighth cards are X punched. Anothermanner of controlling the hammer locks to eifect group indication whichdoes not require X punching either the first or subsequent cards of agroup may be effected as follows:

A tabulating machine to which the present in vention is applied isprovided with contacts which are closed during total taking operationswhich follow the accumulation of data from each group its contacts R22a,thus establishing a circuit from line 95, lower card lever contact LCL,closed if there is a card in position to pass the lower brushes,contacts R'Ib, a plug connection I30, contacts R22a, upper winding ofrelay R8, contacts CF22, to line 99. dotted line position, the closureof contacts CF'Ifl will prevent the energization of .hammer lock magnetI I5 so that printing will take' place when the first card of the nextgroup passes the lower brushes. The contacts TS are opened during cardfeeding operations so that the hammer lock magnet H5 is energized foreach record card after the first printing of the group indication datais suppressed for such record cards. With this arrangement, the reportjust described in Fig. 13 may be readily obtained without X punching thecards themselves.

It will be apparent that printing from record With switch I25 in itscards may be selectively suppressed or enabled for the handling of avariety of problems.

A further example 01' the use of the mechanism may be in handling ofdebit and credit values. For example, where credit amounts areperiorated in their true value in a card field and the same field isutilized to record the combinations oi debit amounts, in such case, ifall credit cards are "X punched and switch I set in its dotted lineposition, only the true credit figures will be printed and the printingoi complements of debit items will be suppressed.

While there has been shown and described and pointed out the fundamentalnovel features of the invention asapplied to a single. modification, itwill be understood that various omissions and substitutions and changesin the form and details of the device illustrated and in its operationmay be made by those skilled in the art without departing from thespirit oi the invention. It is the intention therefore to be limitedonly as indicated by the scope of the following claims.

What is claimed is as follows:

1. In a machine or the class described, a plurality oi difierentiallypositionable type carriers, record sensing means and means controlledthereby to cause positioning of said carriers, printing hammers, one foreach carrier, means normally operative to trip said hammers, presettablemeans arranged to select one or more of said hammers for suppression ofoperation thereof, and means controlled by said sensing means to rendersaid presettable means eflective to prevent operation oi said selectedhammers.

2. In a machine of the class described, means for sensing a group ofrecord cards, one or more of which may contain a special designation,type carriers, and printing hammers therefor, locking means for saidhammers, selectively settable means positionable to render said lockingmeans normally effective or ineflective, and means controlled by saidsensing means in response to the analysis of said special designationsfor reversing the normal condition of said locking means.

3. In a machine of the class described, a plurality of differentiallypositionable type carriers, printing hammers, one for each carrier,means for actuating said hammers, latches normally holding said hammersagainst action, a bail for releasing said latches, a second,manipulative latch for each hammer partially advanoeable to hammerlocking position, record sensing means and means controlled thereby toeflect completion of the advance of said partially advanced latches tothereby lock said hammers against operation.

4. The invention set forth in claim 3 in which each of said secondlatches is separately ad- Justableto partially advanced position wherebyany selected hammer or group 01' hammers may ultimately be lockedthereby.

5. In a machine of the class described, a plurality of type carriers, aprinting hammer for each, means for tripping said hammers for printingaction, a pivoted bar, a plurality of latches, one for each hammer,carried by said bar adjacent to the corresponding hammers, means formoving one or more of said latches partly toward the correspondinghammers without engaging the same, and automatically operated means forrocking said bar to move said partly advanced latches into lockingengagement with their hammers.

6. In a machine having a-plurality of type carriers and a printinghammer for each, a zero printing device for type elements which normallymove to a blank position unless selectively moved to a position to printa zero or other'character, means for disabling the printing hammers inpositions in which the carrier is set to print zero and means controlledby a hammer related to a carrier set to print another character forrender- .ing the disabled hammer effective to print zero from itscarrier.

. 7. In a machine of the class described, means for sensing record cardsfor data representative of debit and credit amounts, including means fordetermining the character of the amount sensed, type carrierscontrolling in accordance with the amount sensed, printing hammers andactuating means therefor, and selectively settable means controlled bysaid determining means for causing the suppression of said actuatingmeans for either kind of amount.

8. In a machine of the class described, means for sensing a group ofrecord cards, one or more of which may contain a special designation,type carriers, printing hammers, one for each carrier, means normallyeffective for actuating said hammers to eiTect printing of data fromeach card of said group of cards. means controlled by said sensing meansin response to the analysis of said special designations for suppressingthe operation of the hammers for the card or cards containing saidspecial designation, and selectively settable mechanism for causing saidsuppressing means to eflect suppression of less than all of said hammerswhereby only part of the data contained in cards having said specialdesignation ALBERT W. MILLS.

will be printed.

